What is the ratio of the change in y-values to the change in x-values?

How do the graphs of y = 1/x and y=5/x+6 compare?

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Bring the fraction a/a-4 to a denominator of 16-a^2